Build a WhatsApp Bot in PHP

{
    "require": {
        "php": ">=7.4",
        "guzzlehttp/guzzle": "^7.8",
        "slim/slim": "3.*"
    },
    "autoload": {
        "psr-4": {
            "App\\": "src/"
        }
    }
}

return [
    'api_token' => 'YOUR_API_TOKEN',
    'webhook_url' => 'https://your-domain.com/webhook'
];

$config = include('config.php');
$apiToken = $config['api_token'];

$config = include('config.php');

// Example: Respond to a basic GET request
if ($_SERVER['REQUEST_METHOD'] === 'GET') {
    echo json_encode(['status' => 'Bot is running']);
}

// Example: Handle a POST request from the webhook
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
    $input = json_decode(file_get_contents('php://input'), true);
    // Process incoming messages here
    file_put_contents('log.txt', print_r($input, true), FILE_APPEND);
}

{
    "status": "Bot is running"
}

// Include the Guzzle library from Composer dependencies
require_once('vendor/autoload.php');

// Initialize the Guzzle HTTP client
$client = new \GuzzleHttp\Client();

try {
    // Make a POST request to the Whapi.Cloud API to send a text message
    $response = $client->request('POST', 'https://gate.whapi.cloud/messages/text', [
        'body' => json_encode([
            'to' => '919984351847', // The recipient's WhatsApp number in international format
            'body' => 'Hello world!' // The text message to send
        ]),
        'headers' => [
            'accept' => 'application/json', // Specify that we expect a JSON response
            'authorization' => 'Bearer YOUR_TOKEN_HERE', // Replace YOUR_TOKEN_HERE with your API token
            'content-type' => 'application/json', // Send data in JSON format
        ],
    ]);

    // Display the API response
    echo "Message sent successfully: " . $response->getBody();
} catch (\GuzzleHttp\Exception\RequestException $e) {
    // Handle any errors during the request
    echo 'Error: ' . $e->getMessage();
}

require_once 'vendor/autoload.php'; // Include Composer autoloader

$config = require 'config.php'; // Load configuration file

$app = new \Slim\App(); // Initialize Slim application

// Route to check if the bot is running
$app->get('/', function ($request, $response) {
    return $response->write('Bot is running'); // Simple health check endpoint
});

// Retrieve the webhook URL from the config file
$webhookUrl = $config['webhook_url'] ?? '/webhook'; // Default to '/webhook' if not set

// Route to handle incoming webhook requests
$app->post($webhookUrl, function ($request, $response) use ($config) {
    // Parse incoming request body as JSON
    $data = json_decode($request->getBody(), true);
    $messages = $data['messages'] ?? []; // Retrieve incoming messages array

    foreach ($messages as $message) {
        // Skip messages sent by the bot itself to prevent infinite loops
        if ($message['from_me']) {
            continue;
        }

        // Extract sender's phone number and message text
        $senderPhone = str_replace('@s.whatsapp.net', '', $message['chat_id']); // Sender's phone number
        $text = strtolower(trim($message['text']['body'] ?? '')); // Message text in lowercase

        // Initialize Guzzle HTTP client
        $client = new \GuzzleHttp\Client();
        $endpoint = 'https://gate.whapi.cloud/messages/text'; // API endpoint for sending messages

        // Define responses for specific commands
        $responses = [
            'help' => 'Here is how I can assist you!',
            'command' => 'Executing your command!',
            'default' => 'Sorry, I didn’t understand that.',
        ];

        // Determine the response based on the received text
        $responseText = $responses[$text] ?? $responses['default'];

        try {
            // Send a response message via the Whapi.Cloud API
            $client->post($endpoint, [
                'headers' => [
                    'accept' => 'application/json', // Expect JSON response
                    'authorization' => 'Bearer ' . $config['api_token'], // Add API token from config
                    'content-type' => 'application/json', // Send data in JSON format
                ],
                'json' => [
                    'to' => $senderPhone, // Recipient's phone number
                    'body' => $responseText, // Response message text
                ],
            ]);
        } catch (\Exception $e) {
            // Log any errors during the message sending process
            error_log('Failed to send message: ' . $e->getMessage());
        }
    }

    // Return a success response to the webhook
    return $response->withJson(['status' => 'success'], 200);
});

// Run the Slim application
$app->run();

require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://gate.whapi.cloud/groups', [
  'body' => '{"participants":["919984351847","919984351848","919984351849"],"subject":"Group Subject 86"}',
  'headers' => [
    'accept' => 'application/json',
    'authorization' => 'Bearer YOUR_TOKEN_HERE',
    'content-type' => 'application/json',
  ],
]);

echo $response->getBody();

require_once('vendor/autoload.php');

$client = new \GuzzleHttp\Client();

$response = $client->request('POST', 'https://gate.whapi.cloud/messages/document', [
  'body' => '{"to":"919984351847","media":"data:application/pdf;base64,JVBERi0xLjQKJdPr6ejM2IFwoS0h...........","caption":"Terms of Service Whapi.Cloud.pdf","filename":"Hello, I am attaching an important file to my message"}',
  'headers' => [
    'accept' => 'application/json',
    'authorization' => 'Bearer YOUR_TOKEN_HERE',
    'content-type' => 'application/json',
  ],
]);

echo $response->getBody();